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458 lines
16 KiB
458 lines
16 KiB
drop table if exists t1, t2;
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SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
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select CASE "b" when "a" then 1 when "b" then 2 END;
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CASE "b" when "a" then 1 when "b" then 2 END
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2
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select CASE "c" when "a" then 1 when "b" then 2 END;
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CASE "c" when "a" then 1 when "b" then 2 END
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NULL
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select CASE "c" when "a" then 1 when "b" then 2 ELSE 3 END;
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CASE "c" when "a" then 1 when "b" then 2 ELSE 3 END
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3
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select CASE BINARY "b" when "a" then 1 when "B" then 2 WHEN "b" then "ok" END;
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CASE BINARY "b" when "a" then 1 when "B" then 2 WHEN "b" then "ok" END
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ok
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select CASE "b" when "a" then 1 when binary "B" then 2 WHEN "b" then "ok" END;
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CASE "b" when "a" then 1 when binary "B" then 2 WHEN "b" then "ok" END
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ok
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select CASE concat("a","b") when concat("ab","") then "a" when "b" then "b" end;
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CASE concat("a","b") when concat("ab","") then "a" when "b" then "b" end
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a
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select CASE when 1=0 then "true" else "false" END;
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CASE when 1=0 then "true" else "false" END
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false
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select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
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CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END
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one
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explain select CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select (case 1 when 1 then 'one' when 2 then 'two' else 'more' end) AS `CASE 1 when 1 then "one" WHEN 2 then "two" ELSE "more" END`
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select CASE 2.0 when 1 then "one" WHEN 2.0 then "two" ELSE "more" END;
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CASE 2.0 when 1 then "one" WHEN 2.0 then "two" ELSE "more" END
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two
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select (CASE "two" when "one" then "1" WHEN "two" then "2" END) | 0;
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(CASE "two" when "one" then "1" WHEN "two" then "2" END) | 0
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2
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select (CASE "two" when "one" then 1.00 WHEN "two" then 2.00 END) +0.0;
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(CASE "two" when "one" then 1.00 WHEN "two" then 2.00 END) +0.0
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2.00
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select case 1/0 when "a" then "true" else "false" END;
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case 1/0 when "a" then "true" else "false" END
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false
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select case 1/0 when "a" then "true" END;
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case 1/0 when "a" then "true" END
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NULL
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select (case 1/0 when "a" then "true" END) | 0;
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(case 1/0 when "a" then "true" END) | 0
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NULL
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select (case 1/0 when "a" then "true" END) + 0.0;
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(case 1/0 when "a" then "true" END) + 0.0
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NULL
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select case when 1>0 then "TRUE" else "FALSE" END;
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case when 1>0 then "TRUE" else "FALSE" END
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TRUE
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select case when 1<0 then "TRUE" else "FALSE" END;
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case when 1<0 then "TRUE" else "FALSE" END
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FALSE
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create table t1 (a int);
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insert into t1 values(1),(2),(3),(4);
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select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
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fcase count(*)
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2 1
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3 1
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0 2
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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explain select case a when 1 then 2 when 2 then 3 else 0 end as fcase, count(*) from t1 group by fcase;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 100.00 Using temporary
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Warnings:
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Note 1003 /* select#1 */ select (case `test`.`t1`.`a` when 1 then 2 when 2 then 3 else 0 end) AS `fcase`,count(0) AS `count(*)` from `test`.`t1` group by `fcase`
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select case a when 1 then "one" when 2 then "two" else "nothing" end as fcase, count(*) from t1 group by fcase;
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fcase count(*)
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one 1
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two 1
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nothing 2
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drop table t1;
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create table t1 (`row` int not null, col int not null, val varchar(255) not null);
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insert into t1 values (1,1,'orange'),(1,2,'large'),(2,1,'yellow'),(2,2,'medium'),(3,1,'green'),(3,2,'small');
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select max(case col when 1 then val else null end) as color from t1 group by `row`;
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color
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orange
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yellow
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green
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drop table t1;
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SET NAMES latin1;
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CREATE TABLE t1 SELECT
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CASE WHEN 1 THEN _latin1'a' COLLATE latin1_danish_ci ELSE _latin1'a' END AS c1,
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CASE WHEN 1 THEN _latin1'a' ELSE _latin1'a' COLLATE latin1_danish_ci END AS c2,
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CASE WHEN 1 THEN 'a' ELSE 1 END AS c3,
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CASE WHEN 1 THEN 1 ELSE 'a' END AS c4,
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CASE WHEN 1 THEN 'a' ELSE 1.0 END AS c5,
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CASE WHEN 1 THEN 1.0 ELSE 'a' END AS c6,
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CASE WHEN 1 THEN 1 ELSE 1.0 END AS c7,
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CASE WHEN 1 THEN 1.0 ELSE 1 END AS c8,
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CASE WHEN 1 THEN 1.0 END AS c9,
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CASE WHEN 1 THEN 0.1e1 else 0.1 END AS c10,
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CASE WHEN 1 THEN 0.1e1 else 1 END AS c11,
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CASE WHEN 1 THEN 0.1e1 else '1' END AS c12
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;
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`c1` varchar(1) CHARACTER SET latin1 COLLATE latin1_danish_ci NOT NULL DEFAULT '',
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`c2` varchar(1) CHARACTER SET latin1 COLLATE latin1_danish_ci NOT NULL DEFAULT '',
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`c3` varchar(1) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`c4` varchar(1) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`c5` varchar(4) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`c6` varchar(4) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`c7` decimal(2,1) NOT NULL DEFAULT '0.0',
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`c8` decimal(2,1) NOT NULL DEFAULT '0.0',
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`c9` decimal(2,1) DEFAULT NULL,
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`c10` double NOT NULL DEFAULT '0',
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`c11` double NOT NULL DEFAULT '0',
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`c12` varchar(22) CHARACTER SET latin1 NOT NULL DEFAULT ''
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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DROP TABLE t1;
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SELECT CASE
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WHEN 1
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THEN _latin1'a' COLLATE latin1_danish_ci
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ELSE _latin1'a' COLLATE latin1_swedish_ci
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END;
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ERROR HY000: Illegal mix of collations (latin1_danish_ci,EXPLICIT) and (latin1_swedish_ci,EXPLICIT) for operation 'case'
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SELECT CASE _latin1'a' COLLATE latin1_general_ci
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WHEN _latin1'a' COLLATE latin1_danish_ci THEN 1
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WHEN _latin1'a' COLLATE latin1_swedish_ci THEN 2
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END;
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ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_danish_ci,EXPLICIT), (latin1_swedish_ci,EXPLICIT) for operation 'case'
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SELECT
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CASE _latin1'a' COLLATE latin1_general_ci WHEN _latin1'A' THEN '1' ELSE 2 END,
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CASE _latin1'a' COLLATE latin1_bin WHEN _latin1'A' THEN '1' ELSE 2 END,
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CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_swedish_ci THEN '1' ELSE 2 END,
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CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_bin THEN '1' ELSE 2 END
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;
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CASE _latin1'a' COLLATE latin1_general_ci WHEN _latin1'A' THEN '1' ELSE 2 END CASE _latin1'a' COLLATE latin1_bin WHEN _latin1'A' THEN '1' ELSE 2 END CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_swedish_ci THEN '1' ELSE 2 END CASE _latin1'a' WHEN _latin1'A' COLLATE latin1_bin THEN '1' ELSE 2 END
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1 2 1 2
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CREATE TABLE t1 SELECT COALESCE(_latin1'a',_latin2'a');
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ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'coalesce'
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CREATE TABLE t1 SELECT COALESCE('a' COLLATE latin1_swedish_ci,'b' COLLATE latin1_bin);
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ERROR HY000: Illegal mix of collations (latin1_swedish_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'coalesce'
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CREATE TABLE t1 SELECT
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COALESCE(1), COALESCE(1.0),COALESCE('a'),
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COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
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COALESCE('a' COLLATE latin1_bin,'b');
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explain SELECT
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COALESCE(1), COALESCE(1.0),COALESCE('a'),
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COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
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COALESCE('a' COLLATE latin1_bin,'b');
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select coalesce(1) AS `COALESCE(1)`,coalesce(1.0) AS `COALESCE(1.0)`,coalesce('a') AS `COALESCE('a')`,coalesce(1,1.0) AS `COALESCE(1,1.0)`,coalesce(1,'1') AS `COALESCE(1,'1')`,coalesce(1.1,'1') AS `COALESCE(1.1,'1')`,coalesce(('a' collate latin1_bin),'b') AS `COALESCE('a' COLLATE latin1_bin,'b')`
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`COALESCE(1)` int(1) NOT NULL DEFAULT '0',
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`COALESCE(1.0)` decimal(2,1) NOT NULL DEFAULT '0.0',
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`COALESCE('a')` varchar(1) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`COALESCE(1,1.0)` decimal(2,1) NOT NULL DEFAULT '0.0',
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`COALESCE(1,'1')` varchar(1) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`COALESCE(1.1,'1')` varchar(4) CHARACTER SET latin1 NOT NULL DEFAULT '',
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`COALESCE('a' COLLATE latin1_bin,'b')` varchar(1) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT ''
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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DROP TABLE t1;
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CREATE TABLE t1 SELECT IFNULL('a' COLLATE latin1_swedish_ci, 'b' COLLATE latin1_bin);
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ERROR HY000: Illegal mix of collations (latin1_swedish_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'ifnull'
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SELECT 'case+union+test'
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UNION
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SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
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case+union+test
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case+union+test
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nobug
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SELECT CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END;
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CASE LOWER('1') WHEN LOWER('2') THEN 'BUG' ELSE 'nobug' END
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nobug
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SELECT 'case+union+test'
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UNION
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SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
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case+union+test
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case+union+test
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nobug
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create table t1(a float, b int default 3);
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insert into t1 (a) values (2), (11), (8);
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select min(a), min(case when 1=1 then a else NULL end),
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min(case when 1!=1 then NULL else a end)
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from t1 where b=3 group by b;
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min(a) min(case when 1=1 then a else NULL end) min(case when 1!=1 then NULL else a end)
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2 2 2
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drop table t1;
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CREATE TABLE t1 (EMPNUM INT);
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INSERT INTO t1 VALUES (0), (2);
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CREATE TABLE t2 (EMPNUM DECIMAL (4, 2));
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INSERT INTO t2 VALUES (0.0), (9.0);
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SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
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t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
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FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
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CEMPNUM EMPMUM1 EMPNUM2
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0.00 0 0.00
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2.00 2 NULL
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SELECT IFNULL(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
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t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
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FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
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CEMPNUM EMPMUM1 EMPNUM2
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0.00 0 0.00
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2.00 2 NULL
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DROP TABLE t1,t2;
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End of 4.1 tests
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create table t1 (a int, b bigint unsigned);
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create table t2 (c int);
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insert into t1 (a, b) values (1,4572794622775114594), (2,18196094287899841997),
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(3,11120436154190595086);
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insert into t2 (c) values (1), (2), (3);
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select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
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join t2 on t1.a=t2.c order by d;
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a d
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1 4572794622775114594
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3 11120436154190595086
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2 18196094287899841997
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select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
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join t2 on t1.a=t2.c where b=11120436154190595086 order by d;
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a d
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3 11120436154190595086
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drop table t1, t2;
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End of 5.0 tests
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CREATE TABLE t1(a YEAR);
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SELECT 1 FROM t1 WHERE a=1 AND CASE 1 WHEN a THEN 1 ELSE 1 END;
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1
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DROP TABLE t1;
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SET sql_mode = default;
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#
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# Bug#19875294 ASSERTION `SRC' FAILED IN MY_STRNXFRM_UNICODE
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# (SIG 6 -STRINGS/CTYPE-UTF8.C:5151)
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#
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set @@sql_mode='';
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CREATE TABLE t1(c1 SET('','')CHARACTER SET ucs2) engine=innodb;
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Warnings:
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Note 1291 Column 'c1' has duplicated value '' in SET
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INSERT INTO t1 VALUES(990101.102);
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Warnings:
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Warning 1265 Data truncated for column 'c1' at row 1
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SELECT COALESCE(c1)FROM t1 ORDER BY 1;
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COALESCE(c1)
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DROP TABLE t1;
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set @@sql_mode=default;
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# Bug#24733658: IF and friends give wrong type for signed and unsigned
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CREATE TABLE source(bt INTEGER, bf INTEGER, i8u BIGINT UNSIGNED, i8s BIGINT);
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INSERT INTO source VALUES
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(1,0,0,-9223372036854775808), (1,0,18446744073709551615,9223372036854775807);
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CREATE TABLE target
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SELECT IF(bt,i8u,i8s) AS u, IF(bf,i8u,i8s) AS s
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FROM source;
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SHOW CREATE TABLE target;
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Table Create Table
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target CREATE TABLE `target` (
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`u` decimal(20,0) DEFAULT NULL,
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`s` decimal(20,0) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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SELECT IF(bt,i8u,i8s) AS u, IF(bf,i8u,i8s) AS s
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FROM source;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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SELECT * FROM target;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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DROP TABLE target;
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CREATE TABLE target
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SELECT CASE WHEN bt THEN i8u ELSE i8s END AS u,
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CASE WHEN bf THEN i8u ELSE i8s END AS s
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FROM source;
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SHOW CREATE TABLE target;
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Table Create Table
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target CREATE TABLE `target` (
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`u` decimal(20,0) DEFAULT NULL,
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`s` decimal(20,0) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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SELECT CASE WHEN bt THEN i8u ELSE i8s END AS u,
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CASE WHEN bf THEN i8u ELSE i8s END AS s
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FROM source;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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SELECT * FROM target;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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DROP TABLE target;
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CREATE TABLE target
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SELECT CASE bt WHEN TRUE THEN i8u WHEN FALSE THEN i8s END AS u,
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CASE bf WHEN TRUE THEN i8u WHEN FALSE THEN i8s END AS s
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FROM source;
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SHOW CREATE TABLE target;
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Table Create Table
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target CREATE TABLE `target` (
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`u` decimal(20,0) DEFAULT NULL,
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`s` decimal(20,0) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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SELECT CASE bt WHEN TRUE THEN i8u WHEN FALSE THEN i8s END AS u,
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CASE bf WHEN TRUE THEN i8u WHEN FALSE THEN i8s END AS s
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FROM source;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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SELECT * FROM target;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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DROP TABLE target;
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CREATE TABLE target
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SELECT COALESCE(i8u, i8s) AS u, COALESCE(i8s, i8u) AS s
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FROM source;
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SHOW CREATE TABLE target;
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Table Create Table
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target CREATE TABLE `target` (
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`u` decimal(20,0) DEFAULT NULL,
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`s` decimal(20,0) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
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SELECT COALESCE(i8u, i8s) AS u, COALESCE(i8s, i8u) AS s
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FROM source;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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SELECT * FROM target;
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u s
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0 -9223372036854775808
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18446744073709551615 9223372036854775807
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DROP TABLE source, target;
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# Bug#25139420: BIT(n) data type confused when used with IF, IFNULL
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CREATE TABLE t (a bit(5));
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INSERT INTO t VALUES
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(0),(1),(2),(3),(4),(5),(6),(7),(8),(9),
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(10),(11),(12),(19),(20),(21),(29),(30),(31);
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SELECT HEX(a),
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IFNULL(a,a) AS b,
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IFNULL(a,a)+0 AS c,
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IFNULL(a+0,a+0) AS d,
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IFNULL(a+0,a) AS e,
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IFNULL(a,a+0) AS f
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FROM t;
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HEX(a) b c d e f
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0 0 0 0 0 0
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1 1 1 1 1 1
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2 2 2 2 2 2
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3 3 3 3 3 3
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4 4 4 4 4 4
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5 5 5 5 5 5
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6 6 6 6 6 6
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7 7 7 7 7 7
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8 8 8 8 8 8
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9 9 9 9 9 9
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A 10 10 10 10 10
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B 11 11 11 11 11
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C 12 12 12 12 12
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13 19 19 19 19 19
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14 20 20 20 20 20
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15 21 21 21 21 21
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1D 29 29 29 29 29
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1E 30 30 30 30 30
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1F 31 31 31 31 31
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CREATE TABLE u AS SELECT HEX(a),
|
|
IFNULL(a,a) AS b,
|
|
IFNULL(a,a)+0 AS c,
|
|
IFNULL(a+0,a+0) AS d,
|
|
IFNULL(a+0,a) AS e,
|
|
IFNULL(a,a+0) AS f
|
|
FROM t;
|
|
SHOW CREATE TABLE u;
|
|
Table Create Table
|
|
u CREATE TABLE `u` (
|
|
`HEX(a)` varchar(10) CHARACTER SET latin1 DEFAULT NULL,
|
|
`b` bit(5) DEFAULT NULL,
|
|
`c` int(6) unsigned DEFAULT NULL,
|
|
`d` bigint(6) unsigned DEFAULT NULL,
|
|
`e` bigint(6) unsigned DEFAULT NULL,
|
|
`f` bigint(6) unsigned DEFAULT NULL
|
|
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
|
|
DROP TABLE t, u;
|
|
# Bug#26389402: Outer join optimized away with user-defined functions
|
|
CREATE TABLE t00(a INTEGER);
|
|
INSERT INTO t00 VALUES (1),(2);
|
|
CREATE TABLE t01(a INTEGER);
|
|
INSERT INTO t01 VALUES (1);
|
|
CREATE VIEW v0 AS
|
|
SELECT t00.a, t01.a AS b, IFNULL(t01.a, 666) AS c
|
|
FROM t00 LEFT JOIN t01 USING(a);
|
|
SELECT * FROM v0
|
|
WHERE c >= 0;
|
|
a b c
|
|
1 1 1
|
|
2 NULL 666
|
|
CREATE FUNCTION f(a INTEGER) RETURNS INTEGER DETERMINISTIC
|
|
RETURN IFNULL(a, 666);
|
|
CREATE VIEW v1 AS
|
|
SELECT t00.a, t01.a AS b, f(t01.a) AS c
|
|
FROM t00 LEFT JOIN t01 USING(a);
|
|
SELECT * FROM v1
|
|
WHERE c >= 0;
|
|
a b c
|
|
1 1 1
|
|
2 NULL 666
|
|
CREATE VIEW v2 AS
|
|
SELECT t00.a, t01.a AS b, f(IFNULL(t01.a, NULL)) AS c
|
|
FROM t00 LEFT JOIN t01 USING(a);
|
|
SELECT * FROM v2
|
|
WHERE c >= 0;
|
|
a b c
|
|
1 1 1
|
|
2 NULL 666
|
|
SELECT t00.a, t01.a AS b, f(t01.a) AS c
|
|
FROM t00 LEFT JOIN t01 USING(a)
|
|
WHERE f(t01.a) >= 0;
|
|
a b c
|
|
1 1 1
|
|
2 NULL 666
|
|
DROP FUNCTION f;
|
|
DROP VIEW v0, v1, v2;
|
|
DROP TABLE t00, t01;
|
|
#
|
|
# Bug #25051195 Wrong calculation of decimals after point for IFNULL w/ GROUP BY using
|
|
# temporary table.
|
|
CREATE TABLE t (i1 INT,
|
|
d1 DOUBLE,
|
|
e2 DECIMAL(5,2));
|
|
INSERT INTO t VALUES ( 6, 6.0, 10.0/3),
|
|
( null, 9.0, 10.0/3),
|
|
( 1, null, 10.0/3),
|
|
( 2, 2.0, null );
|
|
Warnings:
|
|
Note 1265 Data truncated for column 'e2' at row 1
|
|
Note 1265 Data truncated for column 'e2' at row 2
|
|
Note 1265 Data truncated for column 'e2' at row 3
|
|
IFNULL and IF should yield same number for decimals after point here
|
|
SELECT IFNULL(e2,i1) nullif_c,
|
|
IF(e2 IS NULL,i1,e2) if_c,
|
|
SUM(d1) FROM t
|
|
GROUP BY e2,i1 ORDER BY nullif_c, SUM(d1);
|
|
nullif_c if_c SUM(d1)
|
|
2.00 2.00 2
|
|
3.33 3.33 NULL
|
|
3.33 3.33 6
|
|
3.33 3.33 9
|
|
DROP TABLE t;
|
|
# Bug#29463760 In cases like ifnull(datetime(2), time(3), wrong answer
|
|
SET TIMESTAMP=UNIX_TIMESTAMP('2019-03-11 12:00:00');
|
|
CREATE TABLE t1 (dt2 DATETIME(2), t3 TIME(3), d DATE);
|
|
INSERT INTO t1 VALUES ('2001-01-01 00:00:00.12', '00:00:00.567', '2002-01-01');
|
|
SELECT CONCAT(IFNULL(t3, d)) AS col1 FROM t1;
|
|
col1
|
|
2019-03-11 00:00:00.567
|
|
SELECT CONCAT(IFNULL(t3, d)) AS col1 FROM t1 GROUP BY col1;
|
|
col1
|
|
2019-03-11 00:00:00.567
|
|
SET TIMESTAMP=DEFAULT;
|
|
DROP TABLE t1;
|
|
|